1166745851 has 4 divisors (see below), whose sum is σ = 1166880000. Its totient is φ = 1166611704.

The previous prime is 1166745823. The next prime is 1166745859. The reversal of 1166745851 is 1585476611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1585476611 = 13921 ⋅113891.

It is a cyclic number.

It is not a de Polignac number, because 1166745851 - 2²⁶ = 1099636987 is a prime.

It is a super-2 number, since 2×1166745851² = 2722591761651428402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1166745859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53051 + ... + 71748.

It is an arithmetic number, because the mean of its divisors is an integer number (291720000).

Almost surely, 2^1166745851 is an apocalyptic number.

1166745851 is a deficient number, since it is larger than the sum of its proper divisors (134149).

1166745851 is an equidigital number, since it uses as much as digits as its factorization.

1166745851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134148.

The product of its digits is 201600, while the sum is 44.

The square root of 1166745851 is about 34157.6616734811. The cubic root of 1166745851 is about 1052.7504160574.

The spelling of 1166745851 in words is "one billion, one hundred sixty-six million, seven hundred forty-five thousand, eight hundred fifty-one".